pg_language

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pg_language

The pg_language system catalog table registers languages in which you can
write functions or stored procedures. It is populated by CREATE LANGUAGE.

Table 1. pg_catalog.pg_language

column

type

references

description

lanname

name

Name of the language.

lanowner

oid

pg_authid.oid

Owner of the language.

lanispl

boolean

This is false for internal languages (such as SQL) and true for
user-defined languages. Currently, pg_dump still uses this to
determine which languages need to be dumped, but this may be replaced by a different
mechanism in the future.

lanpltrusted

boolean

True if this is a trusted language, which means that it is
believed not to grant access to anything outside the normal SQL execution environment.
Only superusers may create functions in untrusted languages.

lanplcallfoid

oid

pg_proc.oid

For noninternal languages this references the language handler,
which is a special function that is responsible for executing all functions that are
written in the particular language.

laninline

oid

pg_proc.oid

This references a function that is responsible for executing
inline anonymous code blocks (see the DO command). Zero if anonymous blocks
are not supported.

lanvalidator

oid

pg_proc.oid

This references a language validator function that is responsible
for checking the syntax and validity of new functions when they are created. Zero if
no validator is provided.